Results 121 to 130 of about 4,909 (237)
An HHT–ANN Framework for Short‐Term Kp Forecasting
Space Weather, Volume 24, Issue 6, June 2026.Abstract The geomagnetic activity index Kp is an important indicator of solar wind–magnetosphere coupling, and accurate 3‐hr‐ahead forecasting is important for space‐weather monitoring and warning. Because upstream solar wind and interplanetary magnetic field (IMF) signals are strongly nonlinear and nonstationary, methods based only on conventional ...
P. Yang +5 more
wiley +1 more source
Ergoregion instability of black hole mimickers
, 2008 Ultra-compact, horizonless objects such as gravastars, boson stars, wormholes and superspinars can mimick most of the properties of black holes. Here we show that these black hole mimickers will most likely develop a strong ergoregion instability when ...
Cardoso, Vitor +7 more
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The weak cosmic censorship conjecture in hairy Kerr black holes
European Physical Journal C: Particles and FieldsThe weak cosmic censorship conjecture, since its proposal, has always been a controversial hypothesis, but its significance in astrophysics is undeniable.
Lai Zhao, Meirong Tang, Zhaoyi Xu
doaj +1 more source
Tidal Forces in Majumdar-Papapetrou Spacetimes
UniverseTidal disruption events occur when astrophysical objects are destroyed by black holes due to strong tidal force effects. Tidal forces have been studied in a variety of black hole spacetimes, including Reissner-Nordström and Kerr spacetimes.
Eduardo Albacete, Maurício Richartz
doaj +1 more source
Hints of Spin-magnitude Correlations and a Rapidly Spinning Subpopulation of Binary Black Holes
The Astrophysical JournalThe complex astrophysical processes leading to the formation of binary black holes and their eventual merger are imprinted on the spins of the individual black holes.
Asad Hussain +2 more
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, 2013 This chapter analyzes formation mechanisms for supermassive black holes, their observable characteristics, and their interactions with their host galaxies and the wider Universe. A black hole is the end product of the complete gravitational collapse of a
Steven R. Furlanetto, Abraham Loeb
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Astrophysics of stellar black holes
Gravitational Waves and Cosmology, 2018 On September 14 2015, the LIGO interferometers captured a gravitational wave (GW) signal from two merging black holes (BHs), opening the era of GW astrophysics. Five BH mergers have been reported so far, three of them involving massive BHs ($\gtrsim{}30$ M$_\odot$).
openaire +3 more sources
Super-Eddington Black Hole Accretion:
, 2005 Is there an upper limit to the accretion rate dot M, preventing astrophysical black holes to swallow all the matter infalling into them? Many astrophysicists are convinced that the answer to this fundamental question should be: yes, the limit exist and ...
Abramowicz, Marek A,, M.A. Abramowicz
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Identification of Astrophysical Black Holes
, 1998 Latex 55 pages plus 19 postscript figures included. Accepted for publication (March 2nd, 1998) by Indian Journal of Physics (Review Section)
openaire +2 more sources
The formation of satellite galaxies and their associated black holes [PDF]
, 2006 Not ...
Libeskind, Noam Isaac
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